Score | Description of severity |
1 | Plants showing no symptoms |
2 | unclear virus symptoms |
3 | Clear virus symptoms > 5% of plants per plot |
4 | Clear virus symptoms at 6% to 15% of plants per plot |
5 | Clear virus symptoms at 16% to 33% of plant per plot |
6 | Clear virus symptoms at 34% to 66% of plants per plot |
7 | Clear virus symptoms at 67% to 99% of plants per plot |
8 | Clear virus symptoms at all plants per plot |
9 | Severe virus symptoms in all plants per plot |